Absorber for solar heating and method for producing an absorber

Abstract

The invention relates to an absorber ( 10 ), which can be used to produce heat by means of solar heating, the absorber comprising an upper metal sheet ( 12 ) facing the sun and a lower metal sheet ( 14 ) facing away from the sun, between which sheets conducting means ( 18, 54 ) are provided for the substantially linear and/or homogeneous conduction of a fluid from an inlet ( 20 ) to an outlet ( 24 ). The inlet ( 20 ) and/or the outlet ( 24 ) and/or the conducting means ( 18, 54 ) are formed by the upper metal sheet ( 12 ) and/or the lower metal sheet ( 14 ), wherein the inlet ( 20 ) and/or the outlet ( 24 ) and/or the conducting means ( 18, 54 ) can be produced by deep-drawing, thereby resulting in a particularly simple and cost-effective production of the absorber ( 10 ).

1 . An absorber for the recovery of heat from solar heating, comprising:
 an upper plate ( 12 ) facing the sun,   a lower plate ( 14 ) facing away from the sun, and   conduction means ( 18 ,  54 ), formed between the upper plate ( 12 ) and the lower plate ( 14 ), for the essentially linear and/or homogeneous conduction of a fluid through from an inlet ( 20 ) to an outlet ( 24 ), the inlet ( 20 ) and/or the outlet ( 24 ) being formed by the upper plate ( 12 ) and/or the lower plate ( 14 ), and   the inlet ( 20 ) and/or the outlet ( 24 ) and/or the conduction means ( 18 ,  54 ) being capable of being produced by deep drawing.   
   
   
       2 . The absorber as claimed in  claim 1 , wherein the conduction means ( 18 ,  54 ) are formed by the upper plate ( 12 ) and/or the lower plate ( 14 ), in particular by deep drawing. 
   
   
       3 . The absorber as claimed in  claim 1 , wherein the conduction means ( 18 ,  54 ) are formed in one piece with the upper plate ( 12 ) and the lower plate ( 14 ) bears on the conduction means ( 18 ,  54 ), and/or the conduction means ( 18 ,  54 ) are formed in one piece with the lower plate ( 14 ) and the upper plate ( 12 ) bears on the conduction means ( 18 ,  54 ). 
   
   
       4 . The absorber as claimed in  claim 1 , wherein a plurality of conduction means ( 54 ) are provided which are spaced apart from one another in the flow direction and/or transversely to the flow direction and which are contoured fluidically in the flow direction and, in particular, have a length in the flow direction which is greater than a width transversely to the flow direction. 
   
   
       5 . The absorber as claimed in  claim 1 , wherein the lower plate ( 14 ) has an entry basin ( 60 ), assigned to the inlet ( 20 ), for forming an inflow region ( 22 ), an exit basin ( 64 ), assigned to the outlet ( 24 ), for forming an outflow region ( 26 ), and a conduction bottom ( 56 ), via which the entry basin ( 60 ) and the exit basin ( 64 ) are connected to one another, the conduction bottom ( 56 ) being at a shorter distance from the upper plate ( 12 ) than an entry basin bottom ( 58 ) of the entry basin ( 60 ) and an exit basin bottom ( 62 ) of the exit basin ( 64 ). 
   
   
       6 . The absorber as claimed in  claim 1 , wherein the absorber is formed only by the upper plate ( 12 ) and the lower plate ( 14 ) and, if appropriate, a connection means for connecting the upper plate ( 12 ) to the lower plate ( 14 ). 
   
   
       7 . The absorber as claimed in  claim 1 , wherein the inlet ( 20 ) and/or the outlet ( 24 ) are/is designed as (a) protuberance(s) of the upper plate ( 12 ) and/or of the lower plate ( 14 ). 
   
   
       8 . The absorber as claimed in  claim 1 , wherein a positive connection is provided between the upper plate ( 12 )/lower plate ( 14 ) and/or the upper plate ( 12 )/intermediate plate ( 16 ) and/or the intermediate plate ( 16 )/lower plate ( 14 ), the connection taking place, in particular, via an undercut rib ( 32 ), which is inserted in a depression ( 36 ) tapering in the opening region. 
   
   
       9 . The absorber as claimed in  claim 1 , wherein the upper plate ( 12 ) and the lower plate ( 14 ) have in each case a preferably peripheral extension ( 28 ), and the upper plate ( 12 ) and lower plate ( 14 ) are connected to one another via the extension ( 28 ), in particular by adhesive bonding or laser welding. 
   
   
       10 . A method for producing an absorber ( 10 ) for the recovery of heat from solar heating of  claim 1 , comprising:
 provision of a first sheet bar and of a second sheet bar which have been obtained, in particular, by stamping out of one common flat strip,   deep drawing of the first sheet bar to form an upper plate ( 12 ) and/or of the second sheet bar to form a lower plate ( 14 ), during deep drawing an inlet ( 20 ) and/or an outlet ( 24 ) and/or conduction means ( 18 ,  54 ) being formed in the upper plate ( 12 ) and/or in the lower plate ( 14 ), and   connection of the upper plate ( 12 ) to the lower plate ( 14 ) in order to form the absorber ( 10 ).